diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2020-09-02 16:25:59 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-09-04 16:12:55 +0300 |
| commit | b84d42b6c6ac6a60519286e72b69f2dbf08dfb70 (patch) | |
| tree | 6be0e8fcf6014ceb4316c0819738b8ae72047467 | |
| parent | 389cd0cd8b3790b555c3679da946f4aa4fba3bab (diff) | |
| download | linux-b84d42b6c6ac6a60519286e72b69f2dbf08dfb70.tar.xz | |
x86/debug: Remove aout_dump_debugregs()
Unused remnants for the bit-bucket.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Daniel Thompson <daniel.thompson@linaro.org>
Link: https://lore.kernel.org/r/20200902133201.233022474@infradead.org
| -rw-r--r-- | arch/x86/include/asm/debugreg.h | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/hw_breakpoint.c | 36 |
2 files changed, 0 insertions, 38 deletions
diff --git a/arch/x86/include/asm/debugreg.h b/arch/x86/include/asm/debugreg.h index e89558a3fe4a..cfdf307ddc01 100644 --- a/arch/x86/include/asm/debugreg.h +++ b/arch/x86/include/asm/debugreg.h @@ -90,8 +90,6 @@ static __always_inline bool hw_breakpoint_active(void) return __this_cpu_read(cpu_dr7) & DR_GLOBAL_ENABLE_MASK; } -extern void aout_dump_debugregs(struct user *dump); - extern void hw_breakpoint_restore(void); static __always_inline unsigned long local_db_save(void) diff --git a/arch/x86/kernel/hw_breakpoint.c b/arch/x86/kernel/hw_breakpoint.c index b98ff620ba77..ca9de59ffb87 100644 --- a/arch/x86/kernel/hw_breakpoint.c +++ b/arch/x86/kernel/hw_breakpoint.c @@ -442,42 +442,6 @@ int hw_breakpoint_arch_parse(struct perf_event *bp, } /* - * Dump the debug register contents to the user. - * We can't dump our per cpu values because it - * may contain cpu wide breakpoint, something that - * doesn't belong to the current task. - * - * TODO: include non-ptrace user breakpoints (perf) - */ -void aout_dump_debugregs(struct user *dump) -{ - int i; - int dr7 = 0; - struct perf_event *bp; - struct arch_hw_breakpoint *info; - struct thread_struct *thread = ¤t->thread; - - for (i = 0; i < HBP_NUM; i++) { - bp = thread->ptrace_bps[i]; - - if (bp && !bp->attr.disabled) { - dump->u_debugreg[i] = bp->attr.bp_addr; - info = counter_arch_bp(bp); - dr7 |= encode_dr7(i, info->len, info->type); - } else { - dump->u_debugreg[i] = 0; - } - } - - dump->u_debugreg[4] = 0; - dump->u_debugreg[5] = 0; - dump->u_debugreg[6] = current->thread.debugreg6; - - dump->u_debugreg[7] = dr7; -} -EXPORT_SYMBOL_GPL(aout_dump_debugregs); - -/* * Release the user breakpoints used by ptrace */ void flush_ptrace_hw_breakpoint(struct task_struct *tsk) |